August 13, 2026
On most July and August mornings, a rider crests the Tiehack side of Buttermilk before eight, the only sound the click of a derailleur and maybe a marmot complaining from the rocks. The mountain that anchors West Aspen spends the vast majority of the year as the quiet, mellow half of the four-mountain system, the place locals go to log an easy uphill lap or let a beginner try singletrack without consequence. Then, for one weekend each August, the gravel lot at the base fills with Sprinter vans, the trailhead becomes a will-call line, and a mountain built for solitude turns into a stage for tens of thousands of people who flew in specifically to be there.
On Aug. 7 and 8, that second calendar came to life. The Up in the Sky Festival returned to the base of Buttermilk for its second year, with John Summit headlining Friday and Dom Dolla closing out Saturday, backed by Empire of the Sun, Parcels, Polo & Pan, Leon Thomas and a dozen other acts. Belly Up Aspen produced it in partnership with C3 Presents, a lineup jump from the festival's 2025 debut, when RÜFÜS DU SOL and Kacey Musgraves headlined the inaugural edition.
The useful thing to understand about Buttermilk, if you live anywhere near it, is that its identity flips on a schedule West Aspen residents have already memorized without necessarily naming it. Buttermilk is built in three distinct zones: Tiehack, the uphill training ground favored by locals throughout the day; the main mountain; and West Buttermilk, described by Aspen's own tourism office as a mellow beginner's paradise. That layout works fine for skiers, hikers and bikers for most of the year. It is also, not incidentally, the same layout that made Buttermilk the host mountain for X Games every winter since 2002, twenty-five consecutive years as of the January 2026 event, because a mountain gentle enough for a first-time boarder is also flat and open enough at its base to build a stadium.
That duality was already familiar to West Aspen residents before the festival weekend. The same base area that absorbed the 25th annual X Games in January, with free general admission until 4 p.m. and parking staged at the Brush Creek Park & Ride, hosted Up in the Sky on Aug. 7 and 8, minus the snow and the halfpipe. Locals who had already lived through one January festival weekend at this exact location could apply the same mental map to the August festival.
A few concrete arrangements were in place for anyone near Buttermilk during the festival weekend:
None of this was a surprise to anyone who had watched Buttermilk absorb a major event before. It was closer to a rerun with a different soundtrack.
Buttermilk's trail network was largely untouched by the festival. The Government Trail still climbs from behind the tennis courts on Maroon Creek Road, crosses Buttermilk's lower slope, and finishes down in Snowmass, a route that has nothing to do with a festival stage staged at the base. Tiehack still climbs its own line up the mountain's lower shoulder, the same route Buttermilk itself points visitors toward for a summit hike or ride. Buttermilk Bowls, the technical singletrack that drops off the ridge above West Buttermilk into an open meadow and an aspen grove, sits well above where any festival infrastructure goes.
Aspen Snowmass calls Buttermilk simply "a mountain playground loved by all," and for most of the year, that description holds without qualification. The festival occupied the base area and the parking logistics around it. It did not touch the ridge.
The Aspen Airport Business Center, the commercial core of West Aspen sitting three quarters of a mile from Buttermilk, has quietly built a food scene with a strong word-of-mouth following. Several of the restaurant backstories below are drawn from an Aspen Sojo report.
| Spot | What it's known for | Backstory worth knowing |
|---|---|---|
| Mawa's Kitchen / Mawita | Pan-seared sea bass, tapas and wine | Chef Mawa McQueen has cooked locally since 2004; her newer tapas concept, Mawita, keeps the same touch in a smaller-plates format |
| Francesca's Pasta Market | Handmade pasta, Argentinian empanadas | Owner Martin Meineri built the business on family recipes from his Argentinian mother and Italian father |
| French Pastry Cafe & More | Croissants, breakfast sandwiches, panini | Opened by French natives Franck and Marilyn Thirion in 2007, now run by longtime employee Margarita Alvarez since 2018 |
| Pussyfoot Steeps | Burgers, salads, street tacos | Opened at the AABC in fall 2020 |
These spots are outside downtown and offer another place to eat near Buttermilk.
The recent festival offers a useful point of comparison for a much larger disruption West Aspen is approaching. The Aspen-Pitkin County Airport's modernization project is scheduled to close the airport for a stretch in the summer of 2027, with new terminal construction continuing into 2029. Across the highway, construction has already started on the Lumberyard, the city's largest affordable housing development ever, which will add 277 rental units to the AABC in three phases by 2029. City leaders have estimated an 11 to 15 percent softening in local sales tax revenue during the disruption, and business owners interviewed by the Aspen Local, including a partial owner of Silvers Bagel Bar, say they are already adjusting menus and staffing in anticipation.
That is a much bigger disruption than a two-day music festival. But it follows the identical logic Buttermilk has been teaching West Aspen for years: infrastructure gets loud and temporary, then the neighborhood absorbs it and goes back to normal. Residents who have already tracked how a January X Games weekend and an August festival weekend move traffic, fill parking, and shift where people eat are better positioned to read the next few years of construction as a variation on a pattern they already know, not a crisis arriving without warning.
What makes West Aspen work as a place to live is not that it avoids disruption. It is that the disruption has a shape locals have learned to predict. Tiehack remains a quiet uphill route for much of the year. The Government Trail will still cross into Snowmass exactly where it always has. And the mountain that hosts a quarter century of X Games and a second-year music festival in the same twelve months is, for most of the year, the mellow side of the range.
If you are watching this neighborhood for reasons that go beyond a festival weekend, from ski access to AABC's slow evolution into a genuine live-work district, the Saslove and Warwick team spends its time in these details for a living. Reach out when you want a conversation grounded in the neighborhood as it actually runs, not as a brochure describes it.
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